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A159407 Number of n X n arrays of squares of integers summing to 21. 1

%I

%S 28,7182,3923136,2168352600,1094602264164,437181997913808,

%T 123598365410489088,22732655012770729752,2620728473996336526900,

%U 193309311936589609598244,9610726322148658419480768,340892034159072851206852178,9072999131907316862007475724

%N Number of n X n arrays of squares of integers summing to 21.

%H R. H. Hardin, <a href="/A159407/b159407.txt">Table of n, a(n) for n = 2..100</a>

%H Vaclav Kotesovec, <a href="/A159407/a159407.txt">G.f. for A159407</a>

%F G.f.: see link above. - _Vaclav Kotesovec_, Dec 04 2012

%K nonn

%O 2,1

%A _R. H. Hardin_, Apr 11 2009

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Last modified May 21 06:36 EDT 2022. Contains 353889 sequences. (Running on oeis4.)